Fluorine (F2), the most electronegative element reacts with water in a different way compared to other halogens do. According to the amount of fed and rate of feeding to water, products given by the reaction may vary. In this tutorial, we will learn those reactions, products and how to balance fluorine and water reaction.
Fluorine and water reaction is different from how other halogens react with water because fluorine's electronegativity is much greater than other halogens. (Fluorine's is the most electronegative element in periodic table)
Water and fluorine reaction will give products as below.
Oxygen atoms in the water molecules are oxidized to oxygen gas and fluorine is reduced to hydrogen fluoride (HF). Therefore, this reaction is a redox reaction.
Hydrogen fluoride is a weak acid. This is a good example for water is oxidized to oxygen gas reaction.
Hydrogen fluoride is given in this reaction too. But oxygen in the water is oxidized to ozone (O3).
Ozone is a toxic gas in ground level.
When fluorine gas is distilled through cold water (at low temperature), oxygen difluoride (F2O) is given as the product. But due to less solubility, this method is not efficient.
Therefore, fluorine is dissolved in 2% dilute NaOH solution to get F2O in a efficient way.
Hydrogen gas is produced in this reaction as a product. Also this is a rare occasion when oxygen show positive oxidation number.
All reactions of water and fluorine are redox reactions. We will look how to balance them in redox method.
First, find oxidation numbers of each element in the left side and right side of the equation. Then, determine which atoms' oxidation numbers are changed when going to the right side.
Identify oxidation and reduction. Fluorine gas is reduced to hydrogen fluoride while water is oxidized to oxygen gas.
Then equal the number of atoms of the chemical equation which are undergone through oxidation and reduction.
Take the oxidation number differences of oxidation and reduction processes.
Fluorine is a highly toxic pale yellow diatomic gas at standard conditions. It is the most electronegative element in the periodic table and reacts with so many elements to form different compounds.
In both reactions, hydrogen fluoride is given when fluorine reacts with water. Also, hydrogen fluoride is a highly dangerous gas, forming corrosive and penetrating hydrofluoric acid upon contact with moisture. But, in these reaction you will get aqueous hydrogen fluoride solution.
Aqueous HF is a weak acid.
Questions asked by students. Ask your question and find the answer free.
Yes. When fluorine gas meets water vapor, hydrogen fluoride (HF) and oxygen gas (O2) are produed.
In this reaction, ozone gas can be produced as a product. Ozone is a highly toxic gas in ground level. Also, fluorine is a toxic gas and a very strong oxidizing agent.
If amount of fluorine is high or feeding rate is high, ozone can be given.
Ozone or oxygen is given according to the available fluorine amount. When fluorine is in excess amount, ozone will be given. But when amount of fluorine is reduced, oxygen can be given as the product. Therefore, during the reaction, ozone and oxygen can be given as products.
Due to fluorine's higher electronegativity, fluorine can oxidize oxygen atom in water. Iodine is not soluble in water.
Solubility of halogens in water is reduced when going down the group. It means solubility of Chlorine is lower than Fluorine.
When chlorine gas dissolves in water, it gives hydrochloric acid and hypochlorous acid mixture.
Cl2 + H2O → HCl + HOCl
When bromine dissolve in water it gives products as chlorine gives with water. But, solubility of bromine in water is poor. So giving hydrobromic acid (HBr) and hypobromous acid (HOBr) is not success such as formation of HCl and HOCl by chlorine.
Yes. Fluorine reacts with water violently.
Yes. Fluorine dissolve very well in water and reacts readily with water.
F2 is the most soluble halogen and F2 reacts with water very fast than other halogens.
Both halogeh reac differently with water. Due to higher electronegativity, fluorine reacts violently with water and produce oxygen gas. But, chlorine dissolve in water and form HCl and HOCl.